I use to put mine in that soft top bag, now I just lay it as is back in the truck. The bag is good if you're storing it in your house, otherwise its just a waist of time in my opinion and a hassle to put it in and out of the sack.

I only use my soft top bag when I want to store the top outside of the car, i.e. if the hard top is installed or I'm at autocross. Otherwise it takes about as long to get the top back into the bag as it does to put it on the car. So I just lay the soft top in the bottom of the trunk and it's fine.